JPS61208983A - Video signal recording device - Google Patents

Abstract

PURPOSE:To attain high definition picture recording with interchangeability with the conventional mode by sequentially recording simultaneously plural kinds of video signals spatially offset to one another by one field for one kind of the video signals and repeatedly sequentially forming the tracks. CONSTITUTION:Video signals S-1, S-2 obtained from a camera part are processed as usual and simultaneously recorded on magnetic tape through heads A1, B1, A2 and B2. Since the heads are offset by 90 deg., the track pitch is one half that of the usual pitch with the recording time remaining the same. During reproduction, time deviation for the heads A1, B1 and B1, B2 are corrected at a delay line DL and video signals S-1, S-2 are obtained by usual processing. For recording by the conventional mode, video signals are recorded using the heads A1, B2 and switching the signals S-1, S-2 from the camera part for each field. The reproduction is performed as conventional one.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal recording device that is capable of recording high-definition video signals.

[Conventional technology]

FIG. 7 is a block diagram showing a general recording system of a conventional video recorder (VTR).
2 is an image sensor, and 3 is a selector switch.

In a conventional VTR, the two signals obtained by the image sensors 1 and 2 are used as they are as one field's worth of video signals, and these two signals are alternately switched with a changeover switch 3 to form one frame. One field was recorded on each helical track.

[Problem that the invention seeks to solve]

With conventional VTRs such as those described above, the bandwidth that can record video signals is approximately 3 MHz, making it difficult to record high-definition images. In addition, no-interlace Extend
d (hereinafter referred to as ED) There was a problem in that it was not possible to record signals for monitor TV (for example, in the case of NT80, 525 no interlace, 1050 interlace).

This invention was made to solve these problems, and at the same time enables the recording of high-definition video signals.
It is an object of the present invention to provide a video signal recording device that is compatible with conventional devices.

[Means for solving problems]

The video signal recording device according to the present invention simultaneously records a plurality of types of video signals that are spatially offset from each other on one track per field for one type of video signal, and records tracks of each video signal. A mode is provided for sequentially repeating formation.

[Effect]

In this invention, tracks of multiple types of video signals that are spatially offset from each other are simultaneously recorded sequentially on one track for each field of one type of video signal, and the tracks of each video signal are sequentially recorded. By repeating the formation, several times more video information can be recorded, high-definition signals can be recorded, and compatibility with conventional devices can be achieved.

〔Example〕

FIGS. 1 and 3 are block diagrams showing an embodiment of the present invention, in which DL indicates a delay line, and 1 and 2 indicate the same elements as in FIG. 7. Figure 2 is an arrangement diagram of spatially offset pixels.
The case of O12 times fineness will be explained.

Video signals S-1 and S-2 obtained from the camera section in Fig. 1
is processed in the same way as the conventional VTFL, and head A
1 + Bl + A2 + B2 are simultaneously recorded on the magnetic tape. The heads are arranged as shown in the head arrangement diagram of FIG. 4, and FIG. 5 shows the recording on the magnetic tape, the mother turn, and the azimuth angle by these heads. As is clear from Fig. 5, each head is offset by 90°, so when recording at the conventional tape speed, the track pitch will be the conventional A (for example, 29 μm in the standard mode of the VH8 type). The recording time is the same.

When playing, use the configuration shown in Figure 3, and use the head AI
+ B1 and A2. B, the time difference of S-1 and S- is corrected by the delay line DL, and signal processing similar to the conventional method is performed to produce the video signals S-1 and S-.
Get 2. This signal is MO'' in Figure 2.

The interpolation section performs interpolation corresponding to "x" and synthesizes it into one field signal to obtain an interlaced video output. In order to obtain a non-interlaced video output, the signals S-1 and 8-2 are compressed into A by a time axis converter and converted into a time series signal.

Also, when you want to record in the conventional mode, as shown in Figure 7, the video signals S-1 and S-2 obtained from the camera section are
It is sufficient to switch each field and record the video signal using the head 9A□+BS. The recording tape format and anomalous angle are shown in FIG. 6 and are the same as before. Also, in this case, playback can be performed in the conventional mode.

With the above configuration, even when reproducing high-definition recorded video signals on a conventional VTR, if adjacent tracks are recorded with different azimuth angles, the ○ signal and the It is also possible to alternately pick up one field at a time, and compatibility is completely satisfied.

In this case, head A1 plays track A1 with head B.

to play track B2 respectively.

〔Effect of the invention〕

As explained above, the present invention records multiple types of video signals that are spatially offset from each other simultaneously on one track for each field, and repeatedly forms tracks for each video signal in sequence. With this configuration, it is possible to record high-definition images several times that of conventional devices, and at the same time, this high-definition mode also has the effect of being compatible with the conventional mode.

[Brief explanation of drawings]

FIG. 1 shows a high-definition recording mode (second
2 is a block diagram illustrating an example of the spatial offset of the image sensor; FIG. 3 is a block diagram illustrating the high-definition playback mode of an embodiment of the present invention; and FIG. 4 is a block diagram illustrating the head Figure 5 is a tape format diagram showing a high-definition recording pattern, Figure 6 is a tape format diagram showing a conventional recording pattern, and Figure 7 explains the conventional recording mode (first mode). FIG. In the figure, 1 and 2 are image sensors, 3 is a changeover switch, and A
I + BI + A2 + B2 + B3 are heads, respectively, and DL is a delay line. Agent Patent Attorney 1) Haru Kitatake Figure 1 Figure 3

Claims (1)

[Claims] A first mode in which one type of video signal is sequentially recorded on one track for each field, and a first mode in which multiple types of video signals spatially offset from each other are simultaneously recorded one type of video signal for each field. A second video signal is recorded sequentially on the book track and repeatedly forms a track of each video signal in sequence.
A video signal recording device characterized in that it comprises a mode.